I was intrigued by the use of coconut milk in this recipe, so I made the base last night according to the written spec, upping the onions by 0.5kg as suggested by the OP in
#Reply33.
After blending but before second simmer.I used 1.5kg onions and 1.6kg water for the initial boil which took 2.5 hours to get the onions to the proper consistency. After adding the cooked tomatoes and spice mixture, I added a further 0.5kg water to loosen up the sauce. It took another hour or so to get the oil to the surface in any quantity.
So, from around 4kg of ingredients (1.5kg onions + 2.1kg water + 200g tomatoes + approx. 200g for the carrot, green pepper and spices), I realised 2.7kg of base sauce.
I was a bit surprised by the addition of 1 dsp chilli powder in the spicing, and I think I was right to be concerned as the heat definitely comes through in the finished base which limits the addition of further spicing when cooking a meal.
On the other hand, the taste from the addition of coconut milk is, for me anyway, undetectable. I'm not sure what difference the coconut milk makes, but apart from the chilli kick and maybe the saltiness, the base tastes pleasant enough on it own.
I'll be making a curry with this base tonight - maybe a Ceylon.
Edit: I'm going to make loveitspicy's Chasni (omitting the salt and the chilli powder) instead of the Ceylon as it's one of my good lady wife's favourites.